This is so cute! I love the bright colors. What did you use to actually make the cookie? I always look for different things to make for my nieces and nephews for holidays and birthdays. I just think hand made is so much more special. I think my niece would love this! Keep up the good work.

Thank you everybody and to make the oreo biscuits, I used a mold and different coloured polymer clay(: Unfortunately my dog chewed up my mold yesterday, I have found that Etsy is a good place when looking for mold making kits and molds themselves(:

thank you!(: and ohh awesome! im super excited! thank you jojo_modjo! and yes, I used a ruberised mold that is flexible (I think that it best as it is much easier to get the clay out unless your using air drying clay and then I think you can use a stiff mold) and to be honest I think trial and errors best so you can find out which method and materials are best for you(:

What did you make the mold out of, and how did you avoid getting all of the crumbs in the mold? Can I make the mold out of polymer clay, or paperclay?

IMIS, molds for polymer clay can be made from all kinds of things. If they're made from regular polymer clay, they'll be stiff molds (unless using Bake and Bend or MoldMaker but those won't be as good as some of the other flexible mold materials). Stiff molds can't have undercuts though (or only tiny ones) but they can be deep as you want...the molds for these cute cookies could be made with undercuts or without because of their short rounded sides.(Sometimes a release is helpful when using polymer clay in molds made from various materials, but often isn't necessary especially for the firmer clays.)

If you want to make flexible molds for polymer clay (or even for liquid clay) and/or to be able to leave either of those inside the mold while baking, the very best molds would be made from 2-part silicone putties. Other "rubbery" materials can be used but may not last as long or have as smooth a surface as the silicones --though some brands of silicone putty are better than others, especially for best surface smoothness (e.g., Miracle Mold or Alley Goop).

There's much more info about all the things that can be used to make molds for polymer clay on this page of my site, including the silicone putties and polymer clay itself, if you're interested:http://www.glassattic.com/polymer/molds.htm